net: convert to nla_get_*_default()

Most of the original conversion is from the spatch below,
but I edited some and left out other instances that were
either buggy after conversion (where default values don't
fit into the type) or just looked strange.

    @@
    expression attr, def;
    expression val;
    identifier fn =~ "^nla_get_.*";
    fresh identifier dfn = fn ## "_default";
    @@
    (
    -if (attr)
    -  val = fn(attr);
    -else
    -  val = def;
    +val = dfn(attr, def);
    |
    -if (!attr)
    -  val = def;
    -else
    -  val = fn(attr);
    +val = dfn(attr, def);
    |
    -if (!attr)
    -  return def;
    -return fn(attr);
    +return dfn(attr, def);
    |
    -attr ? fn(attr) : def
    +dfn(attr, def)
    |
    -!attr ? def : fn(attr)
    +dfn(attr, def)
    )

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Reviewed-by: Toke Høiland-Jørgensen <toke@kernel.org>
Link: https://patch.msgid.link/20241108114145.0580b8684e7f.I740beeaa2f70ebfc19bfca1045a24d6151992790@changeid
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

2 files changed, 13 insertions, 28 deletions

diff --git a/net/ieee802154/nl-mac.c b/net/ieee802154/nl-mac.c
index 29bf97640166..74ef0a310afb 100644
--- a/net/ieee802154/nl-mac.c
+++ b/net/ieee802154/nl-mac.c
@@ -202,10 +202,7 @@ int ieee802154_associate_req(struct sk_buff *skb, struct genl_info *info)
 	addr.pan_id = nla_get_shortaddr(
 			info->attrs[IEEE802154_ATTR_COORD_PAN_ID]);
 
-	if (info->attrs[IEEE802154_ATTR_PAGE])
-		page = nla_get_u8(info->attrs[IEEE802154_ATTR_PAGE]);
-	else
-		page = 0;
+	page = nla_get_u8_default(info->attrs[IEEE802154_ATTR_PAGE], 0);
 
 	ret = ieee802154_mlme_ops(dev)->assoc_req(dev, &addr,
 			nla_get_u8(info->attrs[IEEE802154_ATTR_CHANNEL]),
@@ -338,10 +335,7 @@ int ieee802154_start_req(struct sk_buff *skb, struct genl_info *info)
 	blx = nla_get_u8(info->attrs[IEEE802154_ATTR_BAT_EXT]);
 	coord_realign = nla_get_u8(info->attrs[IEEE802154_ATTR_COORD_REALIGN]);
 
-	if (info->attrs[IEEE802154_ATTR_PAGE])
-		page = nla_get_u8(info->attrs[IEEE802154_ATTR_PAGE]);
-	else
-		page = 0;
+	page = nla_get_u8_default(info->attrs[IEEE802154_ATTR_PAGE], 0);
 
 	if (addr.short_addr == cpu_to_le16(IEEE802154_ADDR_BROADCAST)) {
 		ieee802154_nl_start_confirm(dev, IEEE802154_NO_SHORT_ADDRESS);
@@ -388,10 +382,7 @@ int ieee802154_scan_req(struct sk_buff *skb, struct genl_info *info)
 	channels = nla_get_u32(info->attrs[IEEE802154_ATTR_CHANNELS]);
 	duration = nla_get_u8(info->attrs[IEEE802154_ATTR_DURATION]);
 
-	if (info->attrs[IEEE802154_ATTR_PAGE])
-		page = nla_get_u8(info->attrs[IEEE802154_ATTR_PAGE]);
-	else
-		page = 0;
+	page = nla_get_u8_default(info->attrs[IEEE802154_ATTR_PAGE], 0);
 
 	ret = ieee802154_mlme_ops(dev)->scan_req(dev, type, channels,
 						 page, duration);
diff --git a/net/ieee802154/nl802154.c b/net/ieee802154/nl802154.c
index 7eb37de3add2..5a024ca60d35 100644
--- a/net/ieee802154/nl802154.c
+++ b/net/ieee802154/nl802154.c
@@ -1438,22 +1438,18 @@ static int nl802154_trigger_scan(struct sk_buff *skb, struct genl_info *info)
 	}
 
 	/* Use current page by default */
-	if (info->attrs[NL802154_ATTR_PAGE])
-		request->page = nla_get_u8(info->attrs[NL802154_ATTR_PAGE]);
-	else
-		request->page = wpan_phy->current_page;
+	request->page = nla_get_u8_default(info->attrs[NL802154_ATTR_PAGE],
+					   wpan_phy->current_page);
 
 	/* Scan all supported channels by default */
-	if (info->attrs[NL802154_ATTR_SCAN_CHANNELS])
-		request->channels = nla_get_u32(info->attrs[NL802154_ATTR_SCAN_CHANNELS]);
-	else
-		request->channels = wpan_phy->supported.channels[request->page];
+	request->channels =
+		nla_get_u32_default(info->attrs[NL802154_ATTR_SCAN_CHANNELS],
+				    wpan_phy->supported.channels[request->page]);
 
 	/* Use maximum duration order by default */
-	if (info->attrs[NL802154_ATTR_SCAN_DURATION])
-		request->duration = nla_get_u8(info->attrs[NL802154_ATTR_SCAN_DURATION]);
-	else
-		request->duration = IEEE802154_MAX_SCAN_DURATION;
+	request->duration =
+		nla_get_u8_default(info->attrs[NL802154_ATTR_SCAN_DURATION],
+				   IEEE802154_MAX_SCAN_DURATION);
 
 	err = rdev_trigger_scan(rdev, request);
 	if (err) {
@@ -1598,10 +1594,8 @@ nl802154_send_beacons(struct sk_buff *skb, struct genl_info *info)
 	request->wpan_phy = wpan_phy;
 
 	/* Use maximum duration order by default */
-	if (info->attrs[NL802154_ATTR_BEACON_INTERVAL])
-		request->interval = nla_get_u8(info->attrs[NL802154_ATTR_BEACON_INTERVAL]);
-	else
-		request->interval = IEEE802154_MAX_SCAN_DURATION;
+	request->interval = nla_get_u8_default(info->attrs[NL802154_ATTR_BEACON_INTERVAL],
+					       IEEE802154_MAX_SCAN_DURATION);
 
 	err = rdev_send_beacons(rdev, request);
 	if (err) {